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10 P. Capiluppi - CSN1 Pisa 22 Giugno 2004 Data Challenge 04 Processing Rate   Processed about 30M events   But DST “errors” make this pass not useful for analysis   Generally kept up at T1’s in CNAF, FNAL, PIC   Got above 25Hz on many short occasions   But only one full day above 25Hz with full system   Working now to document the many different problems

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14 P. Capiluppi - CSN1 Pisa 22 Giugno 2004 the dataset-oriented analysis made the results dependent on which dataset were sent in real time from CERN Tuning of the Tier-1 Replica Agent Replica Agent operation affected by CASTOR problem Analysis Agents were not always up due to debugging for 1 dataset Zipped Metadata were late with respect to data few problems with submission   The minimum time from T0 to T1 analysis was 10 minutes   Different problems contributed to the time spread: Real-time DC04 analysis: Turn-around time from T0 N. De Filippis, A. Fanfani, F. Fanzago

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31 P. Capiluppi - CSN1 Pisa 22 Giugno 2004 Tier-1 Centers are Crucial to CMS u CMS expects to have (External) T1 centers at  CNAF, FNAL, Lyon, Karlsrhue, PIC, RAL  And a Tier-1 center at CERN (Still discussing role of CERN T1) u Current Computing model gives total External T1 requirements  Assumed over 6 centers, but not necessarily 6 equal centers u Tier-1 centers will be crucial for  Calibration, Reprocessing, Data-Serving  To service the requirements of the Tier-2 centers è Both from the region and via explicit relationships with external T2 centers.  Servicing the analysis requirements of their ‘regions’ u Next step is to iterate with the T1 centers/CMS Country managements to understand what they can realistically hope to propose and to possibly succeed in obtaining

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33 P. Capiluppi - CSN1 Pisa 22 Giugno 2004 Tier-2 u Ask Now for intentions from all CMS Agencies  I have an “old” list, I request that you contact me with your intentions so I can bring this up to date. u T1 countries are making a very heavy commitment  They may need to demonstrate sharing of costs with the dependent T2’s  T2’s need to start defining with which T1 they will enter into service agreements, and negotiating with them to how costs will be distributed.